| PROPERTIES | FLY ASH BRICKS | CLAY BRICKS |
| Raw Materials | These Bricks are made from cement, slag, fly ash and sand.(Lime, Gypsum, fly ash & Sand) | Clay Bricks are manufactured from Clay Soil. |
| Shape | Fly ash brick has a more uniform shape as they are cast in machine mold | Clay bricks do not have a uniform shape as they are hand mold-made |
| Compressive Strength | Fly Ash Bricks has compressive strength – 5.5 to 10 Mpa @ 28days | Clay Brick has compressive strength – 3 to 3.5 Mpa |
| Density | Density: 1700-1850 kg/m3 | Density: 1600-1750 kg/m3 |
| Wastage On Site | Fly Ash Bricks wastage on site is around 2 – 5 % | Clay Brick wastage on site is arround 10 % |
| Water Absorption | Fly Ash Bricks has Water Absorption of about 6 -12 % | Clay Brick has Water Absorption of about 20 – 25 % |
| Weight | Fly Ash Bricks Weight is 3 to 3.5 kg | Clay Brick Weight is 3.0 to 4.0 kg |
| Price $ | Fly Ash Bricks Cost is about Rs. 6.7 to 7.5 | Clay Brick Cost is about Rs. 8 to 14 |
| Thermal Insulation | Thermal conductivity is 0.3 to 0.6 W/m K | Thermal conductivity is 0.6 to 1.2 W/m K |
| Termite Resistance | YES | NO |
